The iPhone 5s is launching today in the US, Australia, Canada, China, France, Germany, Japan, Singapore and the UK.
The device can be bough from Apple's own retail stores in the US with a plan for Sprint (https://www.sprint.com/landings/iphone/?INTCID=TSC:UHP:iPhone5s:091013&adSelectData=1:Module_iPhone5S_091013#5s), Verizon (http://www.verizonwireless.com/b2c/device/smartphone/iphone?tab=2) or AT&T (http://www.att.com/wireless/iphone/#fbid=d6wRqyEjoGn) or from T-Mobile (https://explore.t-mobile.com/iphone-5s) (although T-Mo iPhones are expected to ship between 7 and 10 business days).
(http://cdn.gsmarena.com/vv/newsimg/13/09/apple-iphone-5s-sale/gsmarena_001.jpg)
The cost in the US is the usual - 16GB for $199, 32 GB for $299 or 64GB for $399 with a contract. We seriously urge you to get at least the 32GB option as the available user storage on the 16GB version is less than 14GB with no option to expand that later.
As for European prices you can get the iPhone 5s in Germany SIM-free for